How did Ptolemy's model of the solar system explain the apparent changes in speed and direction of the planets?(1 point)

Ptolemy's model of the solar system explained the apparent changes in speed and direction of the planets primarily through the concept of epicycles. According to this model, planets move in small circles (epicycles) that are centered on larger circles (deferents) around the Earth. This system of epicycles allowed for the retrograde motion of planets and other observed changes in their speed and direction.

So, the correct response is: **The planets spun on epicycles.**